Introduction

This is an R Markdown document that visualises the conservation benefits of no take protected areas to 10 teleost and elasmobranch species based on individual movements and relative abundances. The MPA size decision support model was originally developed by Dr Nils Krueck (UTAS) and published here - https://conbio.onlinelibrary.wiley.com/doi/10.1111/conl.12415. Dr Ross Dwyer (USC) and Dr Nils Krueck then adapted this modelling framework to allow telemetry and BRUV datasets to be included as model inputs. The original paper was published here - https://www.sciencedirect.com/science/article/pii/S0960982219316008?via%3Dihub.

In this report, we apply this modelling framework to 6 teleost, three shark and one ray species to investigate the conservation effectiveness of existing no take reserves in South Australia using the following metrics. Project is a collaboration with Prof Charlie Huveneers (Flinders) and South Australia Government’s Department for Environment and Water.

First we set the model parameters

# Set model parameters
case.study.region <- "SA_idealized"
resolution <- 100
dispersal.period <- "Weekly"
age <- "Maturity"
rBRUVcatchment <- 100

Calculate MPA size to achieve certain protection levels

MPAs extending <10 km

MPAs extending <100 km

Calculate lifetime fishing mortality and fishing mortality offsets

F = 0.05

F = 0.1

F = 0.2

F = 0.5

Calculate annual fishing mortality offsets

F = 0.05

F = 0.1

F = 0.2

F = 0.5

Calculate the probability of survival to maturity

F = 0.05

plotProbSurv(F1="0.05")

F = 0.1

F = 0.2

F = 0.5

Calculate number of protected individuals

F = 0.05

plotNoInd("0.05")

F = 0.1

F = 0.2

F = 0.5

Maping South Australia’s protected areas

This Section displays an interactive map of IUCN Cat II reserves in South Australian Waters. The dataset was sourced from the Australian Government Collaborative Australian Protected Area Database (CAPAD 2020) https://www.awe.gov.au/agriculture-land/land/nrs/science/capad. Areas are coloured according to (a) maximum reserve width or (b) the minimum distance between Cat II reserves.

Max width

## tmap mode set to interactive viewing

Min distance